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It very well may still be present, but it would be down quite a bit from where it should be, maybe 20 db or more down. I have an 8558 that was about 10 db down and suspected the mixer. Turned out it

I traced the source of the spikes to some failing halogen light dimmers. I have replaced them and the problem is all but gone. Why the noise gets in to the 3585 is a mystery, but who cares. I am

Well, the 3570A is not working. The A channel gives amplitude readings that are about 90 dB down from the actual input. The B channel is pretty close in amplitude but the phase is way off. So it

(Changing the subject from spectrum analyzers to logic analyzers) The problem with a 16500B

Yeah, I disconnected the battery overnight and shorted the RAM chip Vcc to gnd to clear any leftover capcitance, etc. That had no effect. I'm kind of thinking maybe something was on the verge of

If the mixer is bad will there still be a 35mhz calibraed signal on the screen? please let me know asap. thank you

Thanks, John ... worked great! Jeff

Not exactly their Spanish site but a totally different company. Prologix.com appears to be a logistics company in El Salavador. The maker of the GPIB USB adapters is a small operation that did not

The DRAM chips only need one more address line to be 4Mbit rather than 1Mbit (they're a matrix, not a linear array), and that address line (pin 5) is definitely wired up (to one of the PALs, if I

Chris, probably you're missing two addressing lines to upgrade it to 4mb. I think i have a newer board with More memory, but it is some 600km away, i'll take a look at it as soon as i can Enviado

I've made a bit of progress on upgrading the memory in my 16500A. I looked at the parts I had available, and decided I had little to lose by trying to hack 4MB onto the CPU board myself. I've removed

I got mine fully loaded for $70 :) it is a waiting game, someday you'll spot it. You don't buy blades, period. They are EXPENSIVE when separated. My blades were gotten with the LAs I got (the

Correction to the following: I would characterize the E4406A as a vector *signal* analyzer, not vector *network* analyzer. PW AK6C

Speaking of VNA, I just received an Agilent E4406A this afternoon and have been checking it out. It is around 8 years old and was last calibrated in 2009. I'm having fun with the IQ polar display,

You can control it via HP-IB, RS-232, telnet protocol to socket 5025 (I think) and just type commands that way, or by writing to a particular file while the device is mounted as an NFS file system, or

There's also compatibility issues with keyboards and mice, as well as a limited system memory which keeps you from using certain modules. I don't have a good HPIB interface, at least, not one that I

I’ll vote for an 8568B with an 8447D in front of it. Use a probe with 2pf cap on the end. Do the math and you have a pseudo fet probe > -140 and 100hz to 1.5Ghz. Slip a copper strap around a tube

Yeah, I suppose quite a bit of the cost is in getting the modules _with the probes_. Although some of the logic analyzer and pattern generator probes are pretty trivial and can be fabricated

Perhaps number 1 should be a good *analog* VOM. like a Simpson 260. doug, WA2SAY

So point me at one for fifty bucks, and I'm in.... (seriously, I do have a 16500B.......) However, have you priced the blades? They're not all that cheap unless you go for very early models,